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2. Balance spring - Wikipedia

   en.wikipedia.org/wiki/Balance_spring

   The balance spring is a fine spiral or helical torsion spring used in mechanical watches, alarm clocks, kitchen timers, marine chronometers, and other timekeeping mechanisms to control the rate of oscillation of the balance wheel. The balance spring is an essential adjunct to the balance wheel, causing it to oscillate back and forth.

3. Pierre Le Roy - Wikipedia

   en.wikipedia.org/wiki/Pierre_Le_Roy

   Description of the Le Roy detent escapement mechanism by the Académie des Sciences, 14 August 1748. Le Roy detent escapement mechanism.. In 1748, he invented a pivoted detent type of escapement, [2] or detached escapement, [1] which makes him the inventor of the detent escapement: [2] "The invention of the detached escapement belongs to P. Le Roy". [3]

4. Balance wheel - Wikipedia

   en.wikipedia.org/wiki/Balance_wheel

   A balance wheel, or balance, is the timekeeping device used in mechanical watches and small clocks, analogous to the pendulum in a pendulum clock.It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring, known as the balance spring or hairspring.

5. Nivarox - Wikipedia

   en.wikipedia.org/wiki/Nivarox

   As a trade name, Nivarox is an acronym from the German Nicht variabel oxydfest, 'Non-Variable Non-Oxidizing'.The Nivarox alloy is a nickel iron alloy used mainly in the watch industry for hairsprings for balance wheels, but also in other micro-machine industries and in certain medical equipment and surgical instruments, in the same category as Elinvar, Ni-Span, Vibralloy, Nivaflex and other ...

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